How Relays Work - Basic working principle electronics engineering electrician amp

How relays work. In this video we look at how relays work, what are relays used for, different types of relay, double pole, single pole, phototransistor, solid state relay, semiconductor, flywheel diodes, 8. Suppressor diodes, DPDT, Double Pole, Double Throw Relay, Double throw relay, single throw relay, latching relay, nc, normally closed relay, no, normally open relay, Electromagnetic, electromechanical relay.
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relay working, how relay works, phototransistor, electrician, electronics engineering, electrical machines, amp, everycircuit,
#engineering #electrical #stem

[@EngineeringMindset]

⚠️ *This video took a long time to make* if you would like to buy Paul a coffee to say thanks, link below: ☕ PayPal: www.paypal.me/TheEngineerinMindset Channel membership: kzbin.info/door/k0fGHsCEzGig-rSzkfCjMwjoin Patreon: www.patreon.com/theengineeringmindset

[@lilianayohannes8291]

Ok

[@UjjwalKumar-]

Keep it up Bro 🙏🏼👍🏼❤️👍🏼

[@anthonyjrustysdad6135]

👍

[@waters.create]

Love the video! I was wondering if you’d ever make a video about forms of testing? E.g balance testing for motors or something like IRs? But general one would be really appreciated thank you.

[@gc602]

Thank you very much for your simple, clear and accurate explaination. You cleared the cloud which in my head for years about relay. Now my mind has been satisfied and relaxed. BIG THANKS!!!

[@funkykong9001]

I'm now smarter after watching this. Soon, my knowledge of all things will be complete and I shall rule the galaxy!!!

[@rohitmehta7281]

Lol then the creator of the video is already ruling the galaxy😂

[@IINVICTA]

🤦🏿‍♂️✊

[@altuber99_athlete]

Is this a reference to something?

[@integer9655]

HUMAN's lifetime is not huge or enough for earning knowledge to make themselves as a ruler of the galaxy but if you work hard maybe you can able to rule yourself. wishing you good luck.

[@kilroythegreat7575]

Rock on brother

[@yaswanthamuluru6190]

Best explanation on relays ever I heard, Thanks I want a teacher like you.

[@EngineeringMindset]

You are most welcome. We are your youtube teacher

[@integer9655]

@@EngineeringMindset yes I have some ideas want to share with you and thanks for your best video.

[@shanti__se]

Me too

[@daleorth7690]

Agreed I learned more off this short video than I did going through my apprenticeship lol

[@Goldendeed]

Same though! Amazing

[@markanthonyvaldez4517]

Im a new electrician from the philippines and i can say paul was the best teacher i have never met, thank you sir for all your effort to educate us all your teachings will not go to waste.👍👍👍👏👏👏

[@n.g.1577]

I'm trying to understand the difference between a relay and a step-down transformer. Do you know?

[@user-nv8nq4gd7i]

Iyan ay talagang maganda! Umaasa ako na ikaw ay maging isang mahusay na electrician na maabot ang napakataas!

[@raidoung4100]

" i have never met"- thought that markanthony made a mistake but after a longer thought, now i understand what he wanted to say so its ok XD

[@edgargranada4073]

@@n.g.1577 a relay is a electrical switch and a step down transformer is a transformer with a larger primary and a smaller secondary? i believe

[@edgargranada4073]

@@n.g.1577 the difference would have to be a transformer uses the concept of inductance in order to induce a charge in a secondary coil using the magnetic field of the primary coil while a relay just uses the concept of running a current through a coil in order to create magnetism to create an open or closed switch

[@hightech-lowlife]

Thanks for relaying all of this great information :)

[@EngineeringMindset]

smooth, I like what you did there

[@josecuervo8487]

HA!

[@dienekes4364]

When I bought my last motorcycle, the previous owner had installed additional lights with a manual switch. I wanted the lights to be controlled by the key switch. I talked to a mechanic who told me it was impossible because the key switch couldn't handle that much current. I told them I wanted them to use a relay, but they insisted that the current was too high. So I just did it myself and it worked flawlessly. It was very clear that they had no idea what a relay was. Doing it myself saved me several hundred dollars and took me about 1/2 hour, so I'm actually glad they were so stupid.

[@hshan7126]

if you want something done properly, do it yourself i guess ¯\_(ツ)_/¯

[@federicoteixeiragarrido4659]

I've been watching some of your videos, I really like the way you explain things and the animations make it the more understandable! Thanks a lot, keep them going!

[@cw4608]

This is the best explanation of how relays work and the differences between normally open/closed and single/double throw that I have seen. You have shown, graphically, how each behaves when energized. Thank you!

[@AbuTaher-eh1is]

thank you Paul, for making me smarter in the sense of electrical engineering.

[@b00gi3]

Thank you so much for these extremely thorough crash courses! These are just amazing.

[@douglasharley2440]

this channel just keeps getting better and better! much thanks for this fantastically clear explanation of relays, the animations just amke it so much easier to understand. that being said, it seems that the back-EMF discussion was just kinda tacked-on to the end though, and not fully-integrated with the relay part...lol, since literally everything i know about these subjects comes from here, i guess electromagnetic relays just have the diodes built-in, and since there are no electromagnets involved with solid state relays, they wouldn't have them?

[@rogeliozim456]

I'm current working on a freeze dryer with relay issues and this video had been so helpful understanding what's going on inside these things! I'm also realizing how powerful of a tool relays could be for some basic controls. Thank you for making this video!

[@MainyMitsu]

I know a ton electrical apprentices would love a video on conduit bending. Formulas for finding the right bend degrees and how to bend them. Your guys visuals are the best!

[@jfarr206]

Great video. Very clear and helpful. In the AV industry we typically see relays in control systems, such as to raise or lower a motorized projection screen.

[@Xjaje]

Finally I understand the basis how a relay works! I was struggling for a long time to understand the principle how does it works in reality. Thank you!

[@mugglepower]

this is the best embedded advertisement I've seen on YT. A vid that talks about relays.... also sells me relays. Beautiful! I will gladly take that even if I don't need any relays. So much better than the gaming channels trying to sell you hair lost products or shitty mobile games....

[@mugglepower]

man the idea of a mechanical relay is so much more easier to comprehend than a solid state device.... where you get depletion zones and NP areas and all the dynamic changes that goes on/....

[@mugglepower]

wow, 15 minutes of no BS, easy to digest information. Thank you!

[@ayushsinha1813]

This video should have 10x the views it has.

[@mygt8a4re]

This video really helped me to understand the inner workings of a relay. I have used them, know roughly when & how to install them, but have never really looked into how & why they do exactly what they do. Great vid! Thank you!

[@whogavehimafork]

If you get your hands on some of the clear ones (usually used in industrial settings rather than the common automotive ones) you can see all the inner workings. Super neat actually

[@NavytoSpacerocks]

Once I come back this deployment, I’ll pay you. You are literally helping me a lot things that I didn’t know before. Truly appreciate it.

[@08tundy]

Making a fused, relay box to control a switch panel for a bunch of lights on my side by side… the shop was gonna charge me 2500 lol I bought all material and lights for 300 hahaha thank you for teaching me how useful relays are. We pay for the information we don’t know, I’m thinking of starting a business on lighting circuits…. Thank you 🙏 Blessings on you and your family.

[@nottingtohide]

Learned a bit more about latching & double pole relays. Had this idea of using relays in an inverter project, so can switch between inputting between 12 or 24 volts DC. Simplistic pictures and animations work very well in explaining things.

[@michaellinner7772]

I appreciate the clear graphics and simple explanations. Learning doesn't have to be difficult. It can be very fun as well. The quick explanation of the properties of electrical windings (coils) is a good example of the easy to follow teaching style.

[@Str1k3r1]

As an RV Tech I see relays on the daily. A common control panel on most large units is called a Multi-Plex which is a 3x3 board full of relays. Love learning the intricacies of of how everything works.

[@SushantTyagi]

Thanks for explaining. This is so far the best explanation I've ever seen with examples.

[@LongtowerNyc]

This is the greatest thing I’ve watched all year. Thank you so much for the detailed video.

[@DarthCoco]

Very helpful, as I am currently using a normally-closed relay for a soil-moisture sensor circuit.

[@tommydavie94]

Fantastic video - I have a mechanical background so electrical engineering is not my strongest! I've found I learn so much better/quicker with visual animations and your videos are absolutely spot on, thank you!

[@vaibhavsharma9206]

same I wish, I had a teacher like Paul in my high school instead of choosing mechanical engineering i should have choosen electrical as a core subject.

[@Briannafoots7991]

Electrical and mechanical work hand in hand a lot of times

[@loserphil]

Im an industrial electrical apprentice and this video helped me understand relay circuits a ton !

[@johnstonemwangi3684]

Unbelievably super clear teaching! Excellent sir! Maximum respect to you & thank you ever so much!

[@PapaD93]

It’s unacceptable that you don’t make videos more frequently. I demand more of this amazing content!

[@TantalumPolytope]

we want a good balance of quality and time. if he were to upload faster, the videos wouldnt be as good.

[@nomore4757]

I'm an artist and got no interest on technical matters but your videos are different and got me hook to subscribe and learned interesting facts of electronics. You are a very good instructor indeed!

[@charlie1a5]

I love your explanations. Concise with good animations that are easy to understand. Thanks

[@arrow1476]

Thats one wonderful video that explained very clearly about relays. Thanks so much

[@Duderantula]

I am a BMS engineer, and we use many relays for our control panels! Funny thing is that I did an electrical and electronics engineering degree as uni and didn't even learn about relays - felt like a complete idiot when I started work..! Great video, and kudos for mentioning the flywheel diode, that can easily be overlooked.

[@robertjones6324]

Math, math, and more math.

[@Coolgiy67]

Yup insane I’m an electrical engineering student and they haven’t mentioned relays yet

[@KirstyTube]

Really good video ! I use relay modules to allow my Raspberry Pi to control pumps and heaters for my pond. Be careful though the Pi will only output ~3.3V on the GPIO terminals so you need a module ( or build your own) with an additional 5v supply (usually marked JD VCC OR RM VCC)that actually energises the coil, most include optocoupling and flyback diode.

[@junaidchaudhary8145]

I am from India And I can say Paul is best teacher who helps me

[@EngineeringMindset]

Thank you Junaid, do you know we also have a Hindi channel? kzbin.info/door/g4k338hz9U8jnD5SXPO5jQ

[@maluplayer1]

Thanks for the explanation, I didn't understand the NO and NC contacts and the purpose on PLC drawings for relays before, but I get it now. Thank you so much!

[@tygrallure6895]

I didn't understand how SSRs worked before now. I've been looking everywhere for an explanation on how they worked and this video is the first to fully explain it and give a picture as to how it is working. Thanks!

[@HarshRMaru]

Was eagerly waiting for relays thank you very much.

[@neilfurby555]

Sensible pace, great graphics, well narrated. Excellent…thank you.

[@waleed6178]

its 3am here i have nothing to do with electronics but you videos are so satisfying i give huge amount of knowledge love your channel keep up the good work!

[@mandakhg6568]

For next topic, could you enlighten us about explaining piezoelectricity ?

[@Stasiek_Zabojca]

I really like combination of timed relays and 3-phase relays to make automatic star-delta switch for 3-phase motors. We used to connect them together in technical school at practical lessons. That was fun. However few guys who were not careful enough got shot from 230V AC. 😏

[@digitalkoh]

This is how internet and youtube should be used. Thanks

[@MoreThai]

boy am I wish my instructor explained like this when I was in college !

[@MasterTeeee]

Video: 3:10 - We've looked at solenoids in the past, and check out that video, link in the description below. Me: CTRL+F - "sole" - No match found. ???

[@atomixify]

Thank you for this great video! I've seen tons of relays in nuclear power plants. They are controlled by 110V DC circuits and can actuate 6kV AC circuits to power pumps, compressors and these kinds of things.

[@suryakant6357]

cool but what if one of them malfunctions are we depending on a spring....

[@ashishranjan3501]

Awesome Explanation I ever had of relays. Thank you very much . You are a great teacher providing knowledge for free.

[@dang48]

Great video. We studied relays during my college course and this video helped as a refresher. As for where I've seen relays used, I've seen them used in elevator controllers, fire alarm panels (latching the signal), HVAC equipment and traffic signal controllers to name a few.

[@amitkhedekar8473]

Hey Paul, I have been watching your videos since many days now. I have become a subscriber of your channel and have been learning a lot about the electrical engineering. While going through the list of videos, I didn't find topics on learning how to read a circuit diagram or SLDs. It would be great if you stretch on this topic in 3 types. 1. Basic or simple circuit diagrams for electrical system in a house. 2. Circuit diagrams for a large commercial place such as a mall. 3. Circuit diagrams for an industrial building. Would be great if you make videos on HT (High tension) and LT (Low tension) electrical system as well. Thank you.

[@TheBozn]

Tension? Do you mean potential/voltage? Or are we talking tubes? Circuit diagram for a house or mall is nothing special, just larger than a electronics circuit but the foundation is the same. An installation schematic or diagram is just how you place things in a building etc, which is just too specific for most people and for a general theoretical videos like these. It also depends on where in the world you are. A bit pointless to make videos about it because people can't work on it at home and the principles are the same as in electronics.

[@amitkhedekar8473]

@@TheBozn Yes, the term voltage can also be used.

[@Hopeless_and_Forlorn]

Nice lesson. Now that electromechanical relays are being rapidly replaced by solid state devices, it is interesting to look back on the ways they were designed and used in the sixty years since I began, and subsequently retired from, working aircraft electronics. For one thing, many relays are available with multiple sets of contacts, for instance 6PDT. Numbers of such relays can be wired to perform complex logic functions by wiring the primary circuit of each relay, along with remote inputs from switches and sensors, through secondary contacts in other relays. For instance, relay A coil will operate only when relay B is off (use common and NC contact of relay B), and relay C is on (use com and NO contact of relay C). In fact, simple digital computers have been built using only relays for logic processing. Many power relays, or contactors, will have sets of auxiliary contacts that switch as the main contacts move. The main contacts in a contactor are frequently in 3 sets for switching 3-phase power. The primary circuit for any given contactor may be wired through auxiliary contacts of multiple contactors to ensure that one and only one power source is connected to a bus or load at any given time. You might mention that latching relays are not always necessary for effecting a latching, or holding, circuit. Any relay can be configured as a holding relay by wiring the active wire to the coil in parallel with a set of the same relay's contacts so that once the active primary wire operates the relay, the parallel circuit through its contacts will maintain the coil circuit even after the input signal goes away. Various methods of "resetting," or deactivating, the relay are used, such as a NC push-to-open switch in the parallel circuit. When a contractor needs to be under positive control to open or close only when a discrete signal is received, latching relays are used. I have seen contactors for aircraft generator power evolve from from common relay operation that requires continuous power in coil circuit, to mechanically-latched contactors with separate coils for open and closed function, to magnetically latched contactors with two coils, one to close and one to open, to magnetically latched contactors with a single coil that is closed by a momentary current of one polarity, and opened by a momentary current thought the same coil but of the opposite polarity. It was fun.

[@EngineeringMindset]

See our new video on how to build mechanical versions of electronic circuits? Watch here: kzbin.info/www/bejne/kKecgmqfnZlri8U

[@pryansh_]

an amazing service to your upcoming generation thanking you with lots of love

[@Veterunus]

Your videos are the best part of my week, love learning here

[@tomthumb3085]

It’s always been my opinion that all automotive relay terminals should be numbered in a different way. The primary terminals should be “P1 and P2”, with P1 denoting the switched low current terminal and P2 to ground (or other control circuitry). The secondary terminals would be “SL”, denoting line voltage, “SC” for n/c terminal and “SO” for n/o terminals. This would be far more intuitive than the seemingly random lettering normally used.

[@Boerikoe]

Amen !

[@fulldecent]

Oh you don’t think 30/87/88/87a isn’t clear enough?

[@prashantdeshpande9939]

I have seen relay in electrobooms video When he makes a taser 🙂

[@indhujag5920]

Fantastic explanation ever I had about relays 🤩🤩🤩🤩👏🏻👏🏻thankkk youuuu

[@rubafayiez4454]

Thank you so Much! This helped me a lot , not only for my h.w but also to understand better even more than the teacher's explanation !

[@charliebaltazar7447]

now i understand that my mindset is not for engineering so i just stay in welding

[@toyinorodare4072]

Thank you. now I have a basic understanding of Relay Operation .

[@A.d.r.y.a.n.]

For the moment just a Like and a comment to push your channel further, with love and belief that the Mother Earth will gives you the necessary, to keep spreading knowledgment for those who could one day save our planet. You and this channel are pure light and blessing

[@sWooSH_wHooSH]

First view, first comment:)

[@pankajchaurasia4022]

😭😭😭

[@EngineeringMindset]

Fast!

[@Jarrod_C]

i also thought back emf pushes the electrons or current in the opposite direction, hence "back" emf....

[@chrism7574]

The term back means it opposed the change. In this situation, the change in current is opposite of the direction of the current. So the emf produces current in the same direction. Emf always acts to keep current equal, so it opposed the direction of change.

[@freddiestewart9233]

Thanks for your amazing videos you do an incredible job at explaining topics in Electrical Engineering!

[@LucretiusDraco]

This was fascinating Ty!! Someone tried to explain this using paper and a pencil. I said no thanks I’ll watch a video!

[@lancewalbridge3709]

I'm an elevator mechanic, I don't have the cognitive capacity to figure out how many relays I have replaced in the last 12 years

[@diyguy3165]

So relays go bad quite often? Are they the first thing you check when something electrical is wrong?

[@ALovelyBunchOfDragonballz]

I'm an auto technician, so relays are a daily thing.

[@PrabhjotBhatti]

I think u r saying relays.. #typo

[@olivermitchell7526]

Spelling too right?

[@ALovelyBunchOfDragonballz]

@@PrabhjotBhatti I am now. :)

[@avijitpal1421]

Tell more, how you use it in auto.👍

[@hristijandelov1082]

Well explained. The example with the elevator blew my mind. Thank you!!

[@tatemeeks8705]

I use double throw relays every day in my job. We use them to control electric strike and electromagnet door locks, and in fire alarm systems to control elevators, hvac and locks. Thanks for the video teaching me about the other types

[@rohanbari]

This is the first video I'm watching about relays and I understood the entire thing!

[@drdickqueso]

Im in HVAC school right now so this is really awesome. So helpful. thanks

[@Ladileo1]

This was so incredibly helpful. I'm in school for automotive tech and the first class is electrical..Thank you so much.

[@onlinetechnologytoday5636]

A great relay primer, Kudos to The Engineering Mindset. I wish I had this 60 years or so ago.

[@electronicssciencebysherry5050]

In Luganda we say ''gwe asinga'' meaning u a de best man u realy explain very well

[@nickayivor8432]

SUBSTANTIAL The Engineering Mindset Thank you 👍 From Nick Ayivor from London England UK 🇬🇧

[@samprit5620]

Now I work in an automation based company where NO NC relays play a major role....so thanks for making my concept clear.....

[@chathukawickramasinghe5532]

Thank you very much, this helped me a lot to understand the basic principles.

[@Boerikoe]

Excellent video, thank you very much for sharing and helping others to recognize possible solutions for their projects.

[@hesamsadeghian9396]

Hey! thank you for this great video. I'm looking into installing a PID controller on my espresso machine (my background is not in engineering) so this really helps me to understand the parts needed to make the controller to work. Thanks!!

[@titochineke1236]

Your videos are very easy and straightforward that it explains all the details practically

[@kelsie9912]

Love your videos! this was a great introduction for me to understand what a relay is and how it works. However, a bit too detailed when talking about double pole-double throw etc etc. But I'm sure I'll understand it later on! :P You're helping me through my Electrical Apprenticeship studies!! Thanks!

[@mdpmd11]

7:43 I’m currently in the process of fixing my Toaster oven. I troubleshot the failure to a circuit board. Then my instructor at school helped me isolate the broken relay that controlled the upper heating element. My instructor also recommended to replace the other two identical relays on the circuit board, as PM. I’ll be fixing my toaster oven, and performing PM on it for less than $3!

[@robertouser674]

What a great video this is! You guys make millions of lives easier! Keep the good work!

[@Yacoub_vids_pro]

Ge

[@TimothyChandawira]

Now here is a channel worth pressing the subscribe button for

[@pangetbri]

awesome video explanation with all details included on the circuits...will watch again others vids like this...

[@codybrasil]

Awesome material, we learn useful thing everyday! Thanks 🙏

[@rollietimogan402]

Thank you sharing your advance information of electronic engineering, I have learn your knowledge and most of its easy to understand

[@marcfruchtman9473]

This was exceptionally well done! Great Video.

[@PatrickKing01]

Wow! This is beautiful and enlightening. Thank you!

[@sharadrajpurkar1171]

Really a nice information I ever seen. I got perfect knowledge in several category from your valuable demonstration videos. Thanks sir.

[@AlMuatazAlHabsi-ho4qk]

Well done! on explaining in much detail. Much appreciate your work. keep it going.

[@karlmadl7287]

I recently installed a timer relay in one of my rental residence properties. It’s connected to a button which a customer must press before using the gym. The timer relay powers the gym for 2 hours before shutting off, I installed this because customers tend to forget to turn off the lights, aircon, etc and I have to pay the electric bill… Anyway great content!!

[@Djmahboi879]

Very smart!

[@samuelcarvalho3691]

Thank you so much for making this video. It's crazy good I tell you!

[@orlandocoronadovelarde7969]

Mis Felicitaciones por este material didactico, super bueno. Felicitaciones. Saludos desde mi Peru,

[@alanh.4851]

I just subscribed. I am trying to learn very simple electronics, and I really like the way you explain things while also using animations. I want to fully understand how different types of coils, relays, and inductors work. Magnetic fields fascinate me. I also want to try my hand at building a simple burglar alarm for my door using a relay and piezo buzzer. I just need to understand how to wire the relay to sound the buzzer when the door opens, using a magnetic reed switch. Thank you for sharing your knowledge!

[@LD9user]

Well, that's it...now I know everything. Thanks for a great video.

[@philip2652]

Wonderful explanation, appreciated very much The Engineering Mindset, thanks

[@ethanarts6509]

This helped with all of my problems!!

[@Pivo_Man]

best engineer in the world i have learned so much from you

[@hassanbilal8698]

that's very easy to understand as you explained this lesson very easy and in a good terms

[@musthafamusthafa9029]

This was a very useful video for me